Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB2KJ callsign genealogy
Currently held by Acosta, Efrem
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by AB2KJ's current licensee, walking backwards.
- Acosta, EfremNYgranted 1999-10-16cancelled 2000-09-07
Successor callsigns
Callsigns held now by people who previously held AB2KJ.
- Acosta, EfremNJgranted 2020-10-27